JPH0536443U - Vacuum contact printing machine - Google Patents

Abstract

(57) [Summary] [Purpose] Efficiently sucks out air between the glass plate and the soft sheet to prevent the glass plate, the photosensitive material, and the photographic original plate from being displaced from each other, thereby improving the adhesion. [Structure] A photographic original plate on the glass plate on the top of the box body, the photosensitive material is covered with a soft sheet, and the air between the glass plate and the soft sheet is sucked into a vacuum pump to bring the photographic original plate and the photosensitive material into close contact with the glass plate. In the machine, a soft member frame having a thin portion and a thick portion is airtightly provided on the support frame on the upper part of the box main body with the thin portion being the support frame side, and the glass plate is placed on the thin portion. The recess is formed on the entire circumference of the inner side surface to form a gap between the thick portion and the entire circumference of the glass plate, and the air passage forming member that constantly holds the gap and surrounds the entire circumference of the glass plate is formed in the recess. The air passage forming member is formed by pressing it with a glass plate, and a large number of air holes communicating between the inside and the outside of the air passage forming member are widely distributed, and the gap is formed in the support frame through the through holes formed in the soft member frame and the support frame. Connected to the vacuum pump by airtight communication means It

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vacuum contact printing machine in which a photographic original plate and a photosensitive material are brought into close contact with each other on a glass plate surface by a vacuum action to perform printing.

[0002]

[Prior Art]

 Conventionally, a photographic original plate and a photosensitive material are placed on the upper surface of a glass plate, the glass plate, the photographic original plate, and the photosensitive material are covered with a rubber sheet (soft sheet), and the original plate and the photosensitive material are placed on the glass plate surface by a vacuum action. There is known a vacuum contact printing machine in which exposure is performed and baking is performed from below the glass plate.

In this type of vacuum contact printing machine, as an example, a packing rubber is adhered to the periphery of a glass plate and the glass plate is horizontally attached to the upper part of the box-shaped main body, and the glass plate is placed at one corner of the glass plate or Intake holes are made in the back of the glass plate at multiple points, and vacuum pumps are connected to the holes below the glass plate.The photosensitive material and the photographic original plate are placed on the glass plate. After fixing with a tape, etc., the photosensitive material and the photographic original plate are covered with light-shielding paper or a red film, then these glass plate, photosensitive material and photographic original plate are covered with a rubber sheet, and the vacuum pump is used to remove the gap between the glass plate and the rubber sheet. There is one in which air is sucked and exposure and printing are performed by a light source provided below the glass plate.

As another example, a rubber frame provided with a packing part on the outer periphery is attached to the upper part of a box-shaped main body, and a glass plate is placed on the upper surface of the inner part of the packing part of the rubber frame. Intake holes in the rubber frame, located below the gap between the packing of the rubber frame and the glass plate, and at one location on the corner side of the glass plate or at multiple locations on the back side of the glass plate. Then, a vacuum pump is connected to this through hole below the glass plate, and the photosensitive material and the photographic original plate are placed on the upper surface of the glass plate and fixed with tape or the like. After covering with a red film, the glass plate, the photosensitive material, and the photographic original plate are covered with a rubber sheet, and the air between the glass plate and the rubber sheet is sucked by the vacuum pump, and the light source provided below the glass plate. Exposure and printing by There are things I tried to do.

As still another example, a rubber frame provided with a packing part on the outer periphery is attached to the upper part of a box-shaped main body, and a glass plate is placed on the inner surface of the packing part of the rubber frame. A through hole for air intake is made in one place at the corner of the glass plate or at a plurality of places at the back side of the glass plate, and a vacuum pump is connected to the through hole part below the glass plate, and the upper surface of the glass plate is connected. Place the photosensitive material and the photographic original plate on each other, fix them with tape, etc., cover the photosensitive material and the photo original plate with light-shielding paper or red film, and then cover the glass plate, the photosensitive material and the photo original plate with a rubber sheet, There is one in which air between the glass plate and the rubber sheet is sucked by the vacuum pump, and exposure and printing are performed by a light source provided below the glass plate.

[0006]

[Problems to be solved by the device]

 However, in the above vacuum contact printing machine, when the glass plate is damaged, it takes time to replace the glass plate.In particular, in the vacuum contact printing machine, it takes time to bond the packing rubber around the glass plate. Work may be hindered. In addition, since the vacuum contact printing machine requires a high degree of vacuum between the glass plate and the rubber sheet, the air between the glass plate and the rubber sheet is sucked from the entire circumference of the glass plate to draw the glass. It is desirable to bring the photosensitive material and the photographic original plate into close contact with the plate. However, in the above vacuum contact printing machine, since the air between the glass plate and the rubber sheet is sucked through the through holes at the corners or the back side of the glass plate, It is difficult to fully suck from the entire circumference, and when air is sucked between the glass plate and the rubber sheet, the photographic original plate and the photosensitive material are sucked toward the through hole side and their positions are displaced. There's a problem.

Further, in the above vacuum contact printing machine, it is difficult to hermetically connect the through-hole portion and the vacuum pump, and the through-hole surely opens, so that the entire periphery of the glass plate can be reliably closed. It is difficult to position the glass plate accurately on the rubber frame so that the air gap between the glass plate and the rubber sheet can be removed from the glass plate. There is a problem that it is not possible to suck from the surroundings. In this case, as with the vacuum contact printing machine described above, the air between the glass plate and the rubber sheet is forced through a plurality of through holes at the corners or the back side of the glass plate. Since the air is sucked from the glass plate and the rubber sheet, there is a problem in that when the air is sucked between the glass plate and the rubber sheet, the photographic original plate and the photosensitive material are sucked toward the through hole side and their positions are displaced.

The present invention has been made in view of the above circumstances, and efficiently sucks out the air between the glass plate and the soft sheet, and at the time of sucking out the air, the deviation of the photographic original plate and the light-sensitive material on the glass plate is prevented. It is an object of the present invention to provide a vacuum contact printing machine capable of preventing and improving the adhesion between the glass plate, the photosensitive material and the photographic master plate.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention places a photographic original plate and a photosensitive material on a glass plate provided on an upper part of a box body, and covers the glass plate, the photographic original plate and the photosensitive material with a soft sheet, In a vacuum contact printing machine in which the air between the glass plate and the soft sheet is sucked by a vacuum pump to bring the photographic original plate and the photosensitive material into close contact with the glass plate, a support frame is provided on the upper part of the box body, A stepped soft member frame including a thin portion and a thick portion is airtightly provided on the support frame with the thin portion positioned on the support frame side, and the glass plate is provided on the thin portion. Place it, form a recess on the entire inner surface of the thick portion to form a gap between the thick portion and the entire circumference of the glass plate, and always maintain the gap in the gap. An air passage forming member that surrounds the entire circumference of the glass plate is attached to the inner surface of the recess. A large number of vent holes communicating with the inside and outside of the air passage forming member are formed by being widely spread over the entire air passage forming member, and the thick portion and the glass are formed. A gap between the plate and the entire circumference is communicated with the vacuum pump by a communication means airtightly provided in the support frame through a through hole formed in the soft member frame and the support frame. ..

[0010]

[Action]

 According to the above configuration, the air passage forming member provided between the glass plate and the soft member frame, for example, the compression coil spring secures a gap between the entire circumference of the glass plate and the soft member frame, and By the operation of the pump, the air between the glass plate and the soft sheet is quickly sucked into the vacuum pump from the entire circumference of the glass plate through the gap, the through hole and the communication means. As a result, the photographic original plate and the photosensitive material are quickly and surely brought into close contact with the glass plate without being displaced.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a lower light source type vacuum contact printing machine. In the figure, 1 is a box main body, and a machine frame (support frame) 2 in which a square tube is formed into a square frame is horizontally attached to the upper part of the box main body 1. A rubber frame (soft member frame) 3 is attached on the machine frame 2 so as to face the machine frame 2 by an adhesive means or the like. As shown in FIG. 3, the rubber frame 3 is a planar quadrangular frame having an L-shaped cross section having an inner thin portion 3a and a thick portion 3b on the outer side. A V-shaped groove (concave portion) 4 having a V-shape facing sideways is formed on the inner peripheral surface of the thick portion 3b, and a concave cutout portion 5 is formed on the outer periphery of the thick portion 3b. A glass plate 6 is horizontally placed on the thin portion 3a. A gap 7 is provided between the V groove 4 and the end surface of the glass plate 6. In the gap 7, an air passage forming member that always holds the gap 7 and surrounds the entire circumference of the glass plate 6 (the air passage forming member has a large number of vent holes communicating between the inside and the outside of the air passage forming member). That is, the compression coil spring 8 having a predetermined outer diameter is pressed against the inner surface of the V groove 4 by the glass plate 6 to form a vacuum contact printing machine. It is formed and fitted so as to have a rectangular shape as a whole when viewed from above.

In the present specification, the compression coil spring includes a compression coil spring having a shape of a circle, a triangle, or a quadrangle as viewed from the side orthogonal to the axis of the compression coil spring. These compression coil springs are air passage forming members. It is assumed that the gaps between the wires forming the compression coil spring 8 are widely distributed throughout the air passage forming member, and are a large number of vent holes that communicate the inside and outside of the air passage forming member. .. Further, the material of the air passage forming member (compression coil spring) 8 may be metal, but is not limited to metal, and may be other material such as plastic as long as it has a function described later. Further, the air passage forming member is not limited to the compression coil spring 8 and may be a tubular wall such as a tube or hose having an appropriate hardness in which a large number of holes for communicating the inside and outside of the tube or hose are formed in the outer wall. It may be a tubular member having a large number of vent holes communicating with the inside and outside of the portion corresponding to the tubular wall.

A coaxial through hole 9 is formed in the upper part of the machine frame 2 and the thin portion 3 a of the rubber frame 3, and a through hole 10 is formed in the lower part of the machine frame 2. The through hole 9 is formed at a predetermined position below the gap 7. A pipe joint (communication means) 11 is attached to the lower surface of the machine frame 2 so as to communicate with the through hole 10. The pipe joint 11 is connected to a vacuum pump 12 provided on the bottom of the box body 1 by a pipe (communication means) 13. Therefore, the gap 7 between the rubber frame 3 and the glass plate 6 is communicated with the vacuum pump 12 through the through holes 9 and 10, the pipe joint 11 and the pipe 13. A light source 14 is fixedly attached to the center of the bottom of the box body 1.

On the other hand, on the glass plate 6, a photographic original plate 17, a photosensitive material 18, a pin bar 19 having a plurality of pins 19a, an opaque rubber sheet (soft sheet) 15, etc. are placed. The rubber sheet 15 is usually wound around a roll shaft 16a which is rotatably provided above the upper surface of the rubber frame 3 on the right side in FIG. By rotating the roll shaft 16a, the roll shaft 16a is pulled out and superposed on the glass plate 6, so that the glass plate 6 can be covered.

On the other hand, the ironing member 20 is configured as follows. That is, as shown in FIG. 2, a large number of circular ring plates 21 of the same shape and size are arranged adjacent to each other in the axial direction thereof. A rod 23 having a diameter much smaller than that of the inner hole 22 is passed through the inner hole 22 of each ring plate 21. Collars 24, 24 are fitted to both ends of the rod 23. The large number of ring plates 21 are sandwiched between the collars 24, 24 at both ends of the rod 23. The collars 24, 24 do not rattle each ring plate 21, but are movable in the radial direction thereof. In addition, the rods 23 are fixed to the rod 23 in such a manner that the distance between them is fixed so that they can rotate in the circumferential direction. Therefore, each ring plate 21 is allowed to fall below a predetermined dimension value due to its own weight with respect to the rod 23 kept substantially horizontal, and is prevented from falling above a predetermined dimension value. In FIG. 2, 17a indicates a concave portion, 18a indicates an upper surface of the photosensitive material 18, and 19b indicates a convex portion.

Next, the operation of the vacuum contact printing machine configured as described above will be described. First, the original plate 17 and the photosensitive material 18 are placed on the glass plate 6 in an overlapping manner, and the positions of these are regulated by the pins 19a of the pin bar 19, or they are fixedly attached to the glass plate 6 with light-shielding paper or red film. .. Next, the rubber sheet 15 wound around the roll shaft 16a is pulled out, and the rubber sheet 15 covers the photographic original plate 17, the photosensitive material 18, and the glass plate 6.

Next, the vacuum pump 12 is operated to suck out the air between the glass plate 6 and the rubber sheet 15. In this case, the compression coil spring 8 having an appropriate hardness surrounds the entire circumference of the glass plate 6 so that the glass plate 6 is not displaced from the central portion of the rubber frame 3, and the space between the wire rods, which is the material of the compression coil spring 8, Since there is a space inside the coil, a gap is secured between the end of the glass plate 6 and the V groove 4 of the rubber frame 3. Therefore, when the vacuum pump 12 is operated, the air between the glass plate 6 and the rubber sheet 15 is moved from the entire circumference of the glass plate 6 to the gap 7, the through hole 9, the inside of the machine frame 2, the through hole 10, and the pipe. It is sucked into the vacuum pump 12 through the joint 11 and the pipe 13. Further, at this time, the air between the glass plate 6 and the rubber sheet 15 is sucked out from the entire circumference of the glass plate 6, so that the photographic master plate 17 and the photosensitive material 18 are firmly attached to the glass plate 6 without being displaced. To do.

In this state, on the other hand, the rod 23 of the ironing member 20 is positioned above the roll shaft 16a of the rubber sheet 15 substantially parallel to the glass plate 6 and at a predetermined height. The outer circumferences of the ring plates 21 are pressed against each other by their own weight. Next, the rod 23 is translated from one side of the rubber sheet 15, that is, from the roll shaft 16a side to the other side. Then, as shown in FIG. 2, for example, the ring plate 21 located above the convex portion 19b such as the upper portion of the pin 19a rises and rises above a concave portion such as the concave portion 17a of the photographic original plate 17 that is in close contact with the glass plate 6. The ring plate 21 located at is lowered by its own weight. At this time, since the ring plates 21 have the same shape and the same size and can move up and down with the same weight, the ring plates 21 pass through regardless of the unevenness under the rubber sheet 15. Within the range, the rubber sheet 15 is pressed by the weight of each ring plate 21 with a uniform pressing force. As a result, the ring plate 21 is pressed to, for example, the periphery of the convex portion 19b, the air between the glass plate 6 and the rubber sheet 15 is pushed outward, and the rubber sheet 15 is brought into close contact with the upper surface 18a of the photosensitive material 18. The original plate 17 and the photosensitive material 18 are firmly attached to the glass plate 6 through the sheet 15 in a short time. Next, the light source 14 is used for exposure and printing.

In the above embodiment, the vacuum pump 12 is operated and at the same time, the ironing member 20 is operated to push the air between the glass plate 6 and the rubber sheet 15 to the outside. Even if only the air suction between the glass plate 6 and the rubber sheet 15 by the vacuum pump 12 is omitted, as described above, the air between the glass plate 6 and the rubber sheet 15 does not come from the entire circumference of the glass plate 6. Since it is sucked into the vacuum pump 12, the photographic original plate 17 and the photosensitive material 18 can be reliably brought into close contact with the glass plate 6 without displacement.

Further, in the above-mentioned embodiment, the lower light source type vacuum contact printing in which the photographic original plate on the glass plate and the photosensitive material are covered with a soft sheet, and baking is performed by a light source provided below the glass plate Although the present invention is applied to a machine, the present invention is not limited to this, and a soft member frame including a thin part and a thick part is provided on the support frame provided on the upper part of the box body, and the thin part is provided on the support frame side. The glass plate is placed on the thin part and placed airtightly, and the concave part is formed on the entire inner surface of the thick part to form a gap between the thick part and the entire circumference of the glass plate. In this gap, an air passage forming member that constantly holds this gap and surrounds the entire circumference of the glass plate 6 is provided by pressing the inner surface of the recess by the glass plate, and the air passage forming member is provided with this air passage forming member. A large number of ventilation holes that connect the inside and outside of the The support frame is formed so as to be widely distributed over the whole, and the gap between the thick portion of the soft member frame and the entire circumference of the glass plate is inserted through through holes formed in the soft member frame and the support frame. The glass plate is connected to the vacuum pump by a communication means airtightly provided on the glass plate so that the glass plate is shielded from light, and the soft member frame, the glass plate, the photographic original plate mounted and fixed on the glass plate, and the photosensitive material are transparent. Covered with a soft sheet, the air between the glass plate and the soft sheet was sucked by a vacuum pump, and the photographic master plate and the photosensitive material were firmly attached to the glass plate without misalignment, and it was provided above the transparent soft sheet. The invention of the present application may be applied to an upper light source type in which printing is performed by a light source.

[0021]

[Effect of the device]

 According to the present invention, the original plate on the glass plate on the top of the box body and the photosensitive material are covered with a soft sheet, and the air between the glass plate and the soft sheet is sucked into the vacuum pump to copy the original plate and the photosensitive material onto the glass plate. In a vacuum contact printing machine that adheres closely, a soft member frame with thin and thick parts is airtightly provided on the support frame at the top of the box body with the thin part as the support frame side, and the glass plate is placed on the thin part. , Air that surrounds the entire circumference of the glass plate by forming a recess on the entire inner surface of the thick part to form a gap between the thick part and the entire circumference of the glass plate and always maintaining the gap in the gap. A passage forming member is provided by pressing the concave portion with a glass plate, and a large number of ventilation holes communicating with the inside and outside of the air passage forming member are formed widely distributed throughout the air passage forming member, and the gap is made soft. An airtight connection is provided to the support frame through through holes formed in the member frame and the support frame. Since the glass plate is configured to communicate with the vacuum pump by the means, the glass plate is not displaced from the center of the soft member frame by the air passage forming member, and there is always a gap between the entire circumference of the glass plate and the soft member frame. The air between the glass sheet and the soft sheet can be quickly sucked into the vacuum pump from the entire circumference of the glass sheet by the operation of the vacuum pump, which allows the glass sheet and the soft sheet to be sucked. Efficiently sucks air between the glass plate, the photosensitive material, and the photographic original plate to improve the adhesion between the glass plate, the photosensitive material, and the photographic original plate, and to make the photographic original plate and the photosensitive material adhere to the glass plate quickly and surely without displacement. You can

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 3 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 4 is a plan view of an essential part showing an embodiment of the present invention.

[Explanation of symbols]

 1 Box Main Body 2 Machine Frame (Support Frame) 3 Rubber Frame (Soft Member Frame) 3a Thin-walled Part 3b Thick-walled Part 4 V Groove (Concave) 5 Grooved Part 6 Glass Plate 7 Gap 8 Compression Coil Spring (Air Passage Forming Member) 9, 10 Through hole 11 Pipe joint (communication means) 12 Vacuum pump 13 Pipe (communication means) 14 Light source 15 Rubber sheet (soft sheet) 17 Photograph original plate 18 Photosensitive material

Claims (1)

[Scope of utility model registration request] 1. A photographic original plate and a photosensitive material are placed on a glass plate provided on an upper part of a box body, and the glass plate, the photographic original plate and the photosensitive material are covered with a soft sheet, and the glass plate and the soft sheet are combined. In a vacuum contact printing machine in which the air between is sucked by a vacuum pump to bring the photographic original plate and the photosensitive material into close contact with the glass plate, a support frame is provided on the upper part of the box body, and a thin portion is provided on the support frame. And a stepped soft member frame consisting of a thick portion, the thin portion is located on the side of the support frame in an airtight manner, the glass plate is placed on the thin portion, and A recess is formed on the entire side surface to form a gap between the thick portion and the entire circumference of the glass plate, and an air passage is formed in the gap so as to always maintain the gap and surround the entire circumference of the glass plate. The member is provided by pressing the inner surface of the recess by the glass plate, The air passage forming member is formed with a large number of vent holes communicating between the inside and the outside of the air passage forming member so as to be widely distributed throughout the air passage forming member, and a gap between the thick portion and the entire circumference of the glass plate is formed. A vacuum contact printing machine characterized in that it is connected to the vacuum pump by a communication means airtightly provided on the support frame through a through hole formed in the soft member frame and the support frame.